United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 378
j^^^, … United States Patent Office. JOSEPH E. WASSENICn, OF CHICAGO, ILLINOIS.TABLET FOR RECORDING SOUND-VIBRATIONS. SPECIFICATION forming part of Letters Patent No. 505,910, dated Octobers, 1893.Applieatioafiled Jime 29,1891. Serial No. 397,860. (Model.) To all whom it may concern: Be it known that I,…
Phonograph · Patents
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